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E39 (1997 - 2003) The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

Unless you find a real car nut, most people will not pay extra for all the mods. In fact, for most people, the mods are a deduction from a "normal" price. Even then, E39 buyers tend to prefer a clean, straight car.

Find out what a straight car is worth in your market, and add onto it as you see fit, but be prepared to discount the price. You'll never get out of the mods that you spent on them.

Bear in mind that this car will be perceived as having a lot of hard miles on it, with all the go-fast goodies.

You might try posting in the classified section of the BMW CCA web site.

As per above and especially on this forum, potential buyers are very limited due to the modified condition of the car. In those kinds of potential buyers minds, the car is 'automatically' messed with and therefore worth thousands less. It really comes down to you and your view on how and when to sell. You can wait for someone (like me!!) to purchase and that could happen next week or in 14 months time. However I think the best way is actually to take the modifications off and put back in oem bits and then look at similar age and condition cars with similar levels of history and price yours midway in the price ranges? Then you can sell off your modifications to re-coup some of the money back on those. The Supercharger will probably get snatched up pretty quick provided it's priced nicely enough compared to a new one for instance and those wheels should sell as well. The hood will sell easily but things like the angel eyes and transmission software you may as well leave on the car. It's only if you leave the mods on the car and try to sell, that they'll be looked upon with very little value from most potential buyers, but selling separate always gets you back much more money than leaving them on.

I know there's a few BMW enthusiasts in and around Cincy - I met a few the last time I was there for instance, so have a go selling locally etc and if no one bites, try nationally as well as the de-mod and sell method as well.

Good luck - If I had the cash I'd have considered purchasing and bringing it over here to the UK!!

I concur with what others have said. Buyers want a well-maintained car. Modifications don't enhance value and, unless you can find the right buyer, will actually hurt value.

I sold my Mazdaspeed Miata over the summer. It had some nice modifications with all parts (except the rollbar) from Flyin Miata, a well-know tuner company based in Colorado. Parts from them are made to fit the Miata, not universal fit or adapted from something else. They fit as if they are factory parts.

I ended up getting about what I would've expected to get for an unmodified car, but I had to wait for the right buyer to come along. It took a little over a month. I documented everything very clearly, put up a photo album with high-quality, captioned photographs, and answered emails promptly, completely, and honestly. I had several inquiries from people out of state. I didn't want them investing in a plane ticket to come buy a car that wasn't what they expected. The buyer drove down from NYC to Virginia to inspect and buy the car. We met at his bank branch, his friend test drove the car (the buyer was inexperienced driving a manual transmission) after they both inspected it, and then we went inside the bank to withdraw the money for which I handed him the title and keys. I was about ready to start de-modding the car and returning it to stock condition to sell the flyin miata parts separately when the guy who ended up buying it contacted me.

I like knowing my car went to an enthusiast who appreciates all the work I invested.

For those that have modded these cars, we're all in the same boat here. Sounds to me though like you have extra wheels, parts, etc. If you're truly trying to get the most out of this stuff, I would just try to sell the car by itself and the parts separately.

Definitely don't expect to get even 20% of the original value of your custom modded parts on the sale of your BMW though. Consider those items vanity purchases. It made you feel good driving with those parts right, so that should be worth something to you (just not worth money, unfortunately).